<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <title></title>
</head>
<!--HTML样式，背景颜色，字体，颜色，字体大小，字体对齐方式-->
<body style="background-color:yellow">
<h2 style="background-color:red">This is a heading</h2>
<p style="background-color:green">This is a paragraph</p>

<h1 style="font-family: Verdana">A heading</h1>
<p style="font-family: Arial; color:red;font-size: 20px">A paragraph</p>

<h1 style="text-align: center;">This is a heading</h1>
<p>The heading above is aligned to the center of this page.</p>
</body>
</html>